Network and domain lookup
Inspect IP, DNS, WHOIS, HTTP headers, SSL certificates, and connectivity.
Subcategories
This category is split by real user workflows so each tool set is easier to scan.
Inspect IP, DNS, WHOIS, HTTP headers, SSL certificates, and connectivity.
IP, domains and DNS7 toolsHigh-frequency IP, geolocation, DNS, and WHOIS lookups.
Subnets, addresses and routing7 toolsIPv4/IPv6 subnetting, address conversion, CIDR aggregation, and random addresses.
Web protocols and certificates23 toolsHTTP headers, redirects, compression, origin exposure, CORS, CSP, security-header audits, cache/security policy generators, browser fingerprints, SSL, ports, MIME, user agents, and certificate parsing.
GNSS and NTRIP4 toolsNMEA parsing, checksums, NTRIP source tables, and STR generation.
HTTP headers checker
Use this http headers checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanRedirect chain checker
Trace HTTP redirects, final URL, status codes, hop count, protocol or host changes, and SEO risks.
LookupToolChakanHTTP cache and CDN edge checker
Inspect Cache-Control, Age, Vary, ETag, CDN cache hit or bypass signals, and edge-cache optimization advice for a URL.
LookupToolChakanStatic asset cache strategy checker
Sample a page's CSS, JavaScript, images, fonts, and icons to inspect TTL, immutable, ETag, compression, and broken asset risks.
LookupToolChakanPage resource 404 and performance checker
Sample page resources to find broken assets, redirects, mixed content, render-blocking scripts, missing image dimensions or alt text, and large files.
LookupToolChakanThird-party script governance checker
Sample third-party scripts on a page and inspect SRI, crossorigin, render-blocking behavior, version hints, cache policy, and supply-chain governance risks.
LookupToolChakanGzip and Brotli compression checker
Check whether a URL response enables gzip, brotli, or related content compression and inspect Vary, cache, and content-type signals.
LookupToolChakanOrigin exposure audit
Audit direct DNS exposure, CDN edge hints, HTTP to HTTPS redirects, security headers, and Server or X-Powered-By header leaks.
LookupToolChakanCORS header checker
Check CORS preflight and read-response headers for a URL, Origin, method, and custom request headers without sending write requests.
LookupToolChakanCSP policy checker
Inspect a URL's Content-Security-Policy and Report-Only headers, then flag risky default-src, script-src, object-src, base-uri, and frame-ancestors settings.
LookupToolChakanReferrer-Policy generator
Generate a Referrer-Policy header with Nginx, Apache, Next.js, and HTML meta snippets for privacy and analytics tradeoffs.
LookupToolChakanPermissions-Policy generator
Generate a Permissions-Policy header for camera, microphone, geolocation, payment, USB, Bluetooth, fullscreen, and clipboard permissions.
LookupToolChakanCache-Control generator
Generate a Cache-Control header with public/private scope, max-age, s-maxage, stale-while-revalidate, stale-if-error, and deploy-ready snippets.
LookupToolChakanSecurity header recipe builder
Generate a deploy-ready baseline set of site-wide security headers, including HSTS, X-Frame-Options, Referrer-Policy, Permissions-Policy, and cross-origin isolation defaults.
LookupToolChakanSecurity headers audit
Audit a live URL for deployed HSTS, CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP, CORP, cache, and exposure signals.
LookupToolChakanBrowser privacy and fingerprint checker
Inspect User-Agent, language, timezone, screen, hardware, storage, Canvas, and WebGL fingerprint signals locally in the browser without uploading the result.
LookupToolChakanUser-Agent 解析查看
查看浏览器 User-Agent 字符串里的浏览器、系统、设备类型、渲染引擎和爬虫特征。
User-Agent浏览器爬虫SSL certificate checker
Use this ssl certificate checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanHTTP status checker
Check one public URL for final HTTP status, redirect chain, key response headers, and release-ready troubleshooting suggestions.
LookupToolChakanMIME type lookup
Use this mime type lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPort and protocol lookup
Use this port and protocol lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPort checker
Use this port checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPEM certificate parser
Parse PEM X.509 certificate text to inspect subject, issuer, validity, SAN, fingerprints, and chain blocks.
LookupToolChakan